WebEx outage history

WebEx Calling Provisioning underwent a scheduled maintenance window spanning roughly eight hours, beginning at 2:02 AM UTC and ending at 10:02 AM UTC. The provisioning component transitioned to maintenance during the window and returned to normal once the maintenance concluded, with WebEx Calling services resuming as expected.

WebEx users experienced degraded connectivity starting at 10:02 AM UTC due to connectivity failures with proxy server 69.168.16.27. The issue affected Dedicated Instance/UCM Cloud, causing licensing compliance alarms, making CyberArk/Expressway services inaccessible, and blocking UC app agent reachability from Control Hub. Engineering began investigating and monitoring the impact across affected components.

Engineering deployed a fix at 3:02 PM UTC and WebEx services were reported as fully operational shortly after. The incident was resolved by 3:27 PM UTC, with the Dedicated Instance/UCM Cloud component returning to normal operation. While the issue was localized to the proxy connectivity affecting these components, there was no broader service disruption observed.

Users of Webex Dedicated Instance experienced phone registration failures in the US region, preventing some devices from registering and hindering calling capabilities for affected users. The issue began around 5:02 PM UTC and prompted an active engineering investigation as status updates indicated ongoing work to restore service. Some users reported not having phones available during this period.

As the investigation progressed, the scope appeared to broaden beyond the US, with impact later observed in EMEA, APAC, and ANZ regions around 6:52 PM UTC. After continued health checks, engineers indicated the services were healthy and stable, and monitoring would continue around 7:47 PM UTC. Recovery progressed, and by 10:27 PM UTC the Dedicated Instance component had returned to a healthy state, signaling the incident was resolved.

In the EU region, Webex services experienced intermittent issues that affected video join, in-meeting features (roster, calendar, mute/unmute), and IVR functions. The impact began around 6:38 AM UTC and persisted through about 7:11 AM UTC, with engineering actively investigating through the morning. By 8:27 AM UTC, remediation was completed and services were restored across all regions, with subsequent updates confirming stability and ongoing monitoring. Some users also reported disruption to campaign calls and login-related problems in EU region during the incident, indicating a broader scope beyond initial streaming and meeting features.

An EU-region disruption began during a Webex Calling maintenance window that started at 3:02 AM UTC. By 6:38 AM UTC to 7:11 AM UTC UTC, users across Webex services reported intermittent video join failures and problems with roster, calendar, IVR, and other meeting-related features in the EU region. The issue affected key components including Webex Control Hub and Webex Meetings, limiting login and participation in calls and meetings for many users.

Engineering flagged ongoing EU-region impact at 7:52 AM UTC and expanded the scope as more services showed degraded behavior. After continued investigation, remediation activities were completed and services were restored for all regions by 8:27 AM UTC. A follow-up issue affecting Webex Campaign calls in EU regions appeared at 9:22 AM UTC and was remediated by 9:37 AM UTC. Later in the day, issues with Webex Dedicated Instance involved phone registration in the US and wider regions, with health checks and restoration completed by 10:27 PM UTC.

Overall, the incident primarily affected EU users with multiple services experiencing degraded performance or interruptions, including control hub sign-in and provisioning, video meetings, and related features. The situation evolved from a maintenance window into a regional disruption, then gradually returned to normal as remediation proceeded and health checks confirmed stability.

A scheduled maintenance window for Webex Calling began at 5:07 PM UTC. During the window, Webex Control Hub / Device management and Webex Calling / Devices were placed under maintenance as work proceeded, with the status gradually returning to normal. By 2:02 AM UTC, the Webex Calling / Provisioning component had come back up and the listed components were fully restored, marking the end of the maintenance window. The maintenance spanned the night into the early morning, lasting roughly eight hours and fifty-five minutes.

Users of Webex Calling began seeing misreported device statuses in Webex Control Hub around 12:22 PM UTC. While Webex Calling functionality remained available, the inaccurate status displays could mislead wholesale administrators about device readiness and deployment status.

Engineering identified the issue and began remediation. By 3:42 PM UTC, the AZN and EUN regions were restored, and full regional restoration followed by 4:37 PM UTC. A maintenance window then occurred at 5:07 PM UTC to complete mitigation, with provisioning services fully back online by 2:02 AM UTC.

During a Webex Calling maintenance window, some devices displayed an incorrect status in Webex Control Hub for wholesale administrators. Calling functionality remained available, but the misreported statuses affected admin visibility rather than user-call experience. The issue began with the maintenance window at 12:02 PM UTC and was first acknowledged as a display discrepancy at 12:22 PM UTC.

Engineers worked to restore the correct state, with AZN and EUN regions seeing initial restoration by 3:42 PM UTC and full remediation across all regions by 4:37 PM UTC. A follow-up maintenance cycle temporarily transitioned some components back to normal, and provisioning was fully up by 2:02 AM UTC.

A scheduled maintenance window affected Webex Calling / Provisioning, starting at 12:02 PM UTC and extending into 2:02 AM UTC. The maintenance concluded with Webex Calling / Provisioning returning to up at 9:02 AM UTC after roughly 21 hours. During the window, provisioning and related calling features may have been unavailable or degraded for users relying on Webex Calling.

Webex Calling provisioning underwent a planned maintenance window starting at Aug 18, 2026 12:02 PM UTC and concluding by Aug 19, 2026 8:02 AM UTC. During the window, the Webex Calling / Provisioning component was listed as maintenance, with provisioning operations temporarily unavailable. The maintenance concluded when the component returned to up at Aug 19, 2026 8:02 AM UTC, restoring normal provisioning functionality for Webex Calling.